Interference on a fly situation

[Gael]

Hi,
When a runner interfers with a fielder trying to catch a fly ball in foul territory, the runner is out and it is a foulball for the the batter.
But what happens if the runner interfers with a fly ball in fair territory ? Are they both out ? Or is the first base awarded to the batter (because he hit a fair ball) ?

Thanks,
Gael